﻿using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;
public static class StringHelper
{
    public static IEnumerable<byte> ToBytes(this string str)
    {
        byte[] byteArray = Encoding.Default.GetBytes(str);
        return byteArray;
    }

    public static byte[] ToByteArray(this string str)
    {
        byte[] byteArray = Encoding.Default.GetBytes(str);
        return byteArray;
    }

    public static byte[] ToUtf8(this string str)
    {
        byte[] byteArray = Encoding.UTF8.GetBytes(str);
        return byteArray;
    }

    public static byte[] HexToBytes(this string hexString)
    {
        if (hexString.Length % 2 != 0)
        {
            throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "The binary key cannot have an odd number of digits: {0}", hexString));
        }

        var hexAsBytes = new byte[hexString.Length / 2];
        for (int index = 0; index < hexAsBytes.Length; index++)
        {
            string byteValue = "";
            byteValue += hexString[index * 2];
            byteValue += hexString[index * 2 + 1];
            hexAsBytes[index] = byte.Parse(byteValue, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
        }
        return hexAsBytes;
    }

    public static string Fmt(this string text, params object[] args)
    {
        return string.Format(text, args);
    }

    public static string ListToString<T>(this List<T> list)
    {
        StringBuilder sb = new StringBuilder();
        foreach (T t in list)
        {
            sb.Append(t);
            sb.Append(",");
        }
        return sb.ToString();
    }
}